How To Proceed With Troubleshooting

HINT: 

• Use these procedures to troubleshoot the air conditioning system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK 

   NEXT: Go to next step 

3. INSPECT BATTERY VOLTAGE 
   1. Measure the voltage of the battery.

      Standard voltage

      11 to 14 V

      If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

      NEXT: Go to next step 

4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the CAN communication system is functioning normally.
      RESULT
      
      

      Result	Proceed to
      CAN DTC is not output	A
      CAN DTC is output	B

      B → Go to CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 

      A: Go to next step 

5. CHECK PANEL DIAGNOSIS 
   1. Check panel diagnosis. Refer to DIAGNOSIS SYSTEM .
      1. Indicator Check
      2. Sensor Check

      NEXT: Go to next step 

6. CHECK FOR DTC* 
   1. Check for DTCs and note any codes that are output. Refer to DTC CHECK / CLEAR .
   2. Clear the DTCs. Refer to DTC CHECK / CLEAR .
   3. Based on the DTCs output above, try to force output of the air conditioning system DTC by simulating the conditions indicated by the DTC. Then recheck for DTCs.
      RESULT
      
      

      Result	Proceed to
      DTC is not output	A
      DTC is output	B

      B → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART  

      A: Go to next step 

7. PROBLEM SYMPTOMS TABLE 
   1. Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .
      RESULT
      
      

      Result	Proceed to
      Fault is not listed in problem symptoms table	A
      Fault is listed in problem symptoms table	B

      B → Go to step 9 

      A: Go to next step 

8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Terminals of ECU. Refer to TERMINALS OF ECU 
   2. Data List / Active Test. Refer to DATA LIST / ACTIVE TEST 
   3. On-vehicle Inspection
   4. Inspection

      NEXT: Go to next step 

9. ADJUST, REPAIR OR REPLACE 

   NEXT: Go to next step 

10. CONFIRMATION TEST 

    NEXT → END